Datasheet

Product data sheet Rev. 4 — 19 August 2014 72 of 158

NXP Semiconductors

LPC435x/3x/2x/1x

32-bit ARM Cortex-M4/M0 microcontroller

After a few commands configure the interface at startup, the entire flash content is

accessible as normal memory using byte, halfword, and word accesses by the processor

and/or DMA channels. Simple sequences of commands handle erasing and

programming.

Many serial flash devices use a half-duplex command-driven SPI protocol for device setup

and initialization and then move to a half-duplex, command-driven 4-bit protocol for

normal operation. Different serial flash vendors and devices accept or require different

commands and command formats. SPIFI provides sufficient flexibility to be compatible

with common flash devices and includes extensions to help insure compatibility with future

devices.

7.18.2.1 Features

• Interfaces to serial flash memory in the main memory map.

• Supports classic and 4-bit bidirectional serial protocols.

• Half-duplex protocol compatible with various vendors and devices.

• Quad SPI Flash Interface (SPIFI) with 1-, 2-, or 4-bit data at rates of up to 52 MB per

second.

• Supports DMA access.

7.18.3 SD/MMC card interface

The SD/MMC card interface supports the following modes to control:

• Secure Digital memory (SD version 3.0)

• Secure Digital I/O (SDIO version 2.0)

• Consumer Electronics Advanced Transport Architecture (CE-ATA version 1.1)

• MultiMedia Cards (MMC version 4.4)

7.18.4 External Memory Controller (EMC)

Remark: The EMC is available on all LPC435x/3x/2x/1x parts. The following memory bus

widths are supported:

• LBGA256 packages: 32 bit

• TFBGA100 packages: 8 bit

• LQFP208 packages: 16 bit

• LQFP144 packages: 16 bit

The LPC435x/3x/2x/1x EMC is a Memory Controller peripheral offering support for

asynchronous static memory devices such as RAM, ROM, and NOR flash. In addition, it

can be used as an interface with off-chip memory-mapped devices and peripherals.

Table 6. EMC pinout for different packages

Function LBGA256 TFBGA100 LQFP208 LQFP144

A EMC_A[23:0] EMC_A[13:0] EMC_A[23:0] EMC_A[15:0]

D EMC_D[31:0] EMC_D[7:0] EMC_D[15:0] EMC_D[15:0]

BLS

EMC_BLS[3:0] EMC_BLS0 EMC_BLS[1:0] EMC_BLS[1:0]

CS EMC_CS[3:0] EMC_CS0 EMC_CS[3:0] EMC_CS[1:0]